Demon Powersport PAXL-8018XHD-3.75 X-Treme Heavy Duty ATV/UTV Axle Chromoly - 4340

The Demon Powersport PAXL-8018XHD-3.75 X-Treme Heavy Duty (XHD) Axle is the brand's most performance-engineered ATV/UTV axle, purpose-built for the most demanding off-road environments including desert racing, sand dunes, mud, rocks, and short course competition. Constructed entirely from 4340 Chromoly Steel — from the shaft to the housing, cage, race, and balls — this axle delivers race-ready strength without the premium price tag.

The XHD series features components that are 20–30% larger than Demon's standard Heavy Duty line, including oversized CV joints and shafts. A proprietary dual heat treatment process and re-engineered cage design work together to maximize durability under extreme stress. Internal components are micro-polished to reduce heat buildup, and Molybdenum grease lubricates all moving parts for extended service life.

4340 Chromoly Steel's high elasticity allows the axle shaft and components to absorb drivetrain stress internally, protecting the differential and surrounding components from damage — a critical advantage when running high-power builds or oversized tires.

Key Features:

• Entire axle constructed from 4340 Chromoly Steel (shaft, housing, cage, race, and balls)
• Available in 300M shaft for select fitments
• Re-engineered cage design for enhanced structural durability
• 20–30% larger components compared to the Heavy Duty (HD) line
• Proprietary dual heat treatment process
• Unique boot design for improved sealing and longevity
• Molybdenum high-quality grease for superior lubrication
• Extended swing angles up to 47 degrees
• Optimized for Long Travel and Lift Kit applications
• Compatible with major suspension systems including Cognito Motorsports, HCR, Lone Star Racing, Long Travel Industries, and more
• Backed by an industry-leading 2-Year Limited Warranty

The 3.75 designation indicates this axle is specifically sized for long travel suspension builds, making it a direct-fit solution for popular aftermarket lift and long travel kits. This axle is trusted by professional competitors in BITD, SCORE, and SNORA race series.